The Strider however, appears to have a brain, as seen in Episode Two. It is also unclear whether they all come from the same planet (mirroring the Xen creatures that were also brought from other worlds and, for some of them, also enslaved). It is unknown how many of the Synths presented in the series are 'true' to their initial species or forcefully evolved by the Combine, since the Combine modify their appearance by adding mechanical equipment and weaponry.
Synths always appear as average to large insect-like or arthropod-like creatures, usually with segmented legs or antennae-like sensory structures, resembling locusts, crabs or similar beings. Crab Synths and Mortar Synths being transported on a conveyor belt.
